@Override
protected AccessLogElement[] createLogElements() {
if (log.isDebugEnabled()) {
log.debug("decodePattern, pattern =" + pattern);
}
List<AccessLogElement> list = new ArrayList<AccessLogElement>();
PatternTokenizer tokenizer = new PatternTokenizer(pattern);
try {
// Ignore leading whitespace.
tokenizer.getWhiteSpaces();
if (tokenizer.isEnded()) {
log.info("pattern was just empty or whitespace");
return null;
}
String token = tokenizer.getToken();
while (token != null) {
if (log.isDebugEnabled()) {
log.debug("token = " + token);
}
AccessLogElement element = getLogElement(token, tokenizer);
if (element == null) {
break;
}
list.add(element);
String whiteSpaces = tokenizer.getWhiteSpaces();
if (whiteSpaces.length() > 0) {
list.add(new StringElement(whiteSpaces));
}
if (tokenizer.isEnded()) {
break;
}
token = tokenizer.getToken();
}
if (log.isDebugEnabled()) {
log.debug("finished decoding with element size of: " + list.size());
}
return list.toArray(new AccessLogElement[0]);
} catch (IOException e) {
log.error("parse error", e);
return null;
}
}
